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I have a 98 GSR. I just can't get my SMC to do what I want with my 450 DSM's. for some reason I keep getting a BARO code(13) or P1106(same thing). I just can't deal with it anymore. I know there are ALOT of people running the SMC, but I have heard of a few that just couldn't get it to work. I'm one of them. I was looking into the HKS super AFR. it sounds alot better than the apexi AFC. anyone know about this product? also, how do I put check valves on my MAP sensor? it bolts right into the manifold!